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Let's Investigate Triangles

Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?

Three Fingers and a Loop of String

Using a loop of string stretched around three of your fingers, what different triangles can you make? Draw them and sort them into groups.

Colouring Triangles

Explore ways of colouring this set of triangles. Can you make symmetrical patterns?

Seven Sticks

Age 5 to 7 Challenge Level:

Why do this problem?

This problem allows children to be creative in applying their knowledge of properties of triangles. It will encourage learners to talk to each other and therefore will help them become more familiar with appropriate vocabulary.

Key questions

What do you know about triangles?
How will you remember that arrangement?

Possible support

Many learners will benefit from having sticks of some kind to manipulate, for example headless matches or lolly sticks.